Characteristic Property of Impact Fracture Toughness

• Maekawa Ichiro

• Shibata Hiroshi

抄録

Impact fracture experiments were performed using three CT type specimens made of PMMA with the size ratio 1 : 2 : 3 with analogous geometry. A precrack was introduced artificially in each specimen, which was subjected to impact by a wedge bar. The flyer was accelerated by a gas gun to impose an impact force to the wedge bar, and the fracture behavior was measured by a strain gage cemented at the crack tip of each specimen. Based on the diagram of the dynamic strain history, the impact fracture toughness K_{I, IC} was evaluated. The results showed that K_{I, IC} of a small specimen was lower than that of a large one, and that it decreased with increasing impact velocity. When the specimen was partially supported by a notched wall, K_{I, IC} increased, except for the S-type specimen. At low temperature, K_{I, IC} increased for all specimens. A dense distribution of parabola patterns was observed on the fractured surface of L-type specimens.

収録刊行物

• JSME international journal. Ser. A, Mechanics and material engineering

  JSME international journal. Ser. A, Mechanics and material engineering 38 (1), 80-83, 1995-01-15

  一般社団法人 日本機械学会

キーワード

• Crack Propagation
• High-Polymer Materials
• Impact Strength
• Fracture Toughness
• Fractography

詳細情報

• CRID: 1390282680408994048
• NII論文ID: 110002964257
• NII書誌ID: AA10888746
• DOI: 10.1299/jsmea1993.38.1_80
• ISSN: 13408046
• Web Site: https://www.jstage.jst.go.jp/article/jsmea1993/38/1/38_1_80/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可